
<h1><span class="yiyi-st" id="yiyi-12">numpy.matlib.eye</span></h1>
        <blockquote>
        <p>原文：<a href="https://docs.scipy.org/doc/numpy/reference/generated/numpy.matlib.eye.html">https://docs.scipy.org/doc/numpy/reference/generated/numpy.matlib.eye.html</a></p>
        <p>译者：<a href="https://github.com/wizardforcel">飞龙</a> <a href="http://usyiyi.cn/">UsyiyiCN</a></p>
        <p>校对：（虚位以待）</p>
        </blockquote>
    
<dl class="function">
<dt id="numpy.matlib.eye"><span class="yiyi-st" id="yiyi-13"> <code class="descclassname">numpy.matlib.</code><code class="descname">eye</code><span class="sig-paren">(</span><em>n</em>, <em>M=None</em>, <em>k=0</em>, <em>dtype=&lt;type &apos;float&apos;&gt;</em><span class="sig-paren">)</span><a class="reference external" href="http://github.com/numpy/numpy/blob/v1.11.3/numpy/matlib.py#L176-L213"><span class="viewcode-link">[source]</span></a></span></dt>
<dd><p><span class="yiyi-st" id="yiyi-14">返回一个矩阵，在对角线上的1和其他地方的零。</span></p>
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<tr class="field-odd field"><th class="field-name"><span class="yiyi-st" id="yiyi-15">参数：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-16"><strong>n</strong>：int</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-17">输出中的行数。</span></p>
</div></blockquote>
<p><span class="yiyi-st" id="yiyi-18"><strong>M</strong>：int，可选</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-19">输出中的列数，默认为<em class="xref py py-obj">n</em>。</span></p>
</div></blockquote>
<p><span class="yiyi-st" id="yiyi-20"><strong>k</strong>：int，可选</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-21">对角线的索引：0表示主对角线，正值表示上对角线，负值表示下对角线。</span></p>
</div></blockquote>
<p><span class="yiyi-st" id="yiyi-22"><strong>dtype</strong>：dtype，可选</span></p>
<blockquote>
<div><p><span class="yiyi-st" id="yiyi-23">返回矩阵的数据类型。</span></p>
</div></blockquote>
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<tr class="field-even field"><th class="field-name"><span class="yiyi-st" id="yiyi-24">返回：</span></th><td class="field-body"><p class="first"><span class="yiyi-st" id="yiyi-25"><strong>I</strong>：matrix</span></p>
<blockquote class="last">
<div><p><span class="yiyi-st" id="yiyi-26">A <em class="xref py py-obj">n</em> x <em class="xref py py-obj">M</em>矩阵，其中除了其值等于1的<em class="xref py py-obj">k</em>对角线，所有元素都等于零。</span></p>
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<div class="admonition seealso">
<p class="first admonition-title"><span class="yiyi-st" id="yiyi-27">也可以看看</span></p>
<dl class="last docutils">
<dt><span class="yiyi-st" id="yiyi-28"><a class="reference internal" href="numpy.eye.html#numpy.eye" title="numpy.eye"><code class="xref py py-obj docutils literal"><span class="pre">numpy.eye</span></code></a></span></dt>
<dd><span class="yiyi-st" id="yiyi-29">等效数组功能。</span></dd>
<dt><span class="yiyi-st" id="yiyi-30"><a class="reference internal" href="numpy.matlib.identity.html#numpy.matlib.identity" title="numpy.matlib.identity"><code class="xref py py-obj docutils literal"><span class="pre">identity</span></code></a></span></dt>
<dd><span class="yiyi-st" id="yiyi-31">平方单位矩阵。</span></dd>
</dl>
</div>
<p class="rubric"><span class="yiyi-st" id="yiyi-32">例子</span></p>
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">numpy.matlib</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">np</span><span class="o">.</span><span class="n">matlib</span><span class="o">.</span><span class="n">eye</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="n">k</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">dtype</span><span class="o">=</span><span class="nb">float</span><span class="p">)</span>
<span class="go">matrix([[ 0.,  1.,  0.],</span>
<span class="go">        [ 0.,  0.,  1.],</span>
<span class="go">        [ 0.,  0.,  0.]])</span>
</pre></div>
</div>
</dd></dl>
